Please utilize these fashion retail math formulas at your own risk. The Apparel Search Company is "not" comprised of mathematicians. We have simply listed formulas that we have collected over the years. In addition, we have supplemented the listing with information that we have received from our viewers. If you have additional formulas or you think any of the above formulas are incorrect, please let us know.
You may also want to learn about retail store
assortment planning from our fashion terms section.
Help us improve; you can email additional formulas or good examples to go with our formulas to us from our contact page.
$ Cost = $ Retail x (100%  Markup %)
Cost of Goods Sold (COGS) =
Beginning Inventory
+ Purchases  End Inventory
The above formula is an example of a company that sells finished goods. The formula can be applied to one week, one month or a year, but must be the same for each value of the formula. The formula for a manufacturer includes raw goods and unfinished product in inventory. There is no formula for a service firm, which relies exclusively on market research of competitors and deciding a pricing strategy that allows profitability.
Here is another way of stating the same formula:
inventory at beginning of year + purchases or additions during the
year = goods available for sale  inventory at end of year = cost of goods
sold
$ Retail = $ Cost / (100%  markup %)
$ Markdown = Original retail price  lower retail price
GMROI (Gross Margin Return On
Investment) = (GM% x turnover) / (1  markup %)
an example of how to calculate ones return on investment, (ROI).
Last August the stores sales were $ 1,814,476, beginning inventory was 4,875,911, and ending inventory was 4,693,452. August maintained a markup of 28%.
The formula for reaching the ROI in this scenario would be as follows.
Last Years August sales $1,814,476 x 28% = $508,053.28
Beginning Inventory $4,875,911 + Ending Inventory 4,693,452 = 9,569,363 divided by 2 = 4,784,681
508,053.28 divided by 4,784,691.5 = 10.6 % ROI (Return on Investment)
Gross Margin = Sales  cost of good sold
Margin % = ($ Retail  $ Cost) / $ Retail
Markdown % = $ Markdown / $ Net Sales
Markup = The difference between the cost of an item and its selling price.
Markup cancellation = Reduction from original markup %
Planned Stock = planned monthly sales x stock sales ratio
It is calculated by dividing the number of units sold by the beginning onhand inventory (for that same time period).
Example:
During the month of August you sell 100 shirts. You received 300 shirts in receipts. You end August with 900 units shirts of stock (End of Month Stock). What was your Beginning OnHand units of shirts and what was your Sellthrough?
Beginning of Month stock (BOM) = EOM 900 units  Receipts 300 units + Sales 100 units = 700 units
Sellthrough = Sales 100 units / Beginning Inventory (BOM) 700 = 14.3% Sellthrough in August.
BOM
means Beginning of Month
EOM means End of Month
Stock Sales Ratio = B.O.M. $ Stock / Sales for period
Note: B.O.M = beginning of month
Shrinkage = Difference between book and physical inventory
"inventory turnover." Turnover is the number of times you sell your average investment in inventory each year.
Turnover = net sales for period / average stock for period
Here is another way of stating the same formula:
Cost of Goods Sold from Stock Sales during the Past 12
Months
Average Inventory Investment during the Past 12 Months
Inventory turns: The retail sales for a period divided by the average inventory value for that period. Most retailers are in the range of two to four turns a year.
Average Stock = sum of each periods Beginning of Period stock + the last End of Period stock / # of periods
Breakeven = Fixed Costs / (Revenue
Variable Costs)
Breakeven Analysis: Simply stated, this formula indicates how much sales volume must be accomplished in order to cover all costs (fixed and variable), and begin generating a profit. In other words, it is the point in sales volume at which you have no profit and no loss. This is most commonly applied to a business that sells product.
Inventory divided by average weekly sales for a given period of time.
If you have $10,000. worth of inventory in sweaters, and your total sales of sweaters for the past 5 weeks is $20,000. the calculation would look as below:
$20,000 divided by 5 = average weekly sales of $4,000.
$10,000. divided by $4,000.00 = 2.5
This means that if you did not replenish your sweater inventory and sales continued at the same rate, you would deplete your inventory of sweaters to zero within 2 1/2 weeks.
By the way, what are the odds that the your inventory would sell at the "same rate" week after week. Maybe this is why clothing stores are always out of my size.
If you do not find enough on this page, you can find books about retail math in the Math for Merchandising Books section.If you are a clothing retailer and you have retail math formulas that are not listed on this page, PLEASE let us know them so we can make this section more complete.
